Blank for changeable alpha numeric characters



FIG. 1 is a front perspective view of a blank for changeable alphanumeric characters showing my new design with the broken line showingfor illustrative purposes only and forming no part of the claimeddesign;

FIG. 2 is a rear plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is an enlarged partial front bottom left corner thereof.

The ornamental design for a blank for changeable alpha numericcharacters, as shown and described.